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Experimental separation of the coherent component of X‐ray scattering prior to RDF analysis of non‐crystalline polymers
Author(s) -
Mitchell G. R.,
Windle A. H.
Publication year - 1980
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889880011740
Subject(s) - analyser , scattering , diffractometer , component (thermodynamics) , resolution (logic) , optics , detector , polymer , signal (programming language) , materials science , computational physics , noise (video) , physics , analytical chemistry (journal) , chemistry , nuclear magnetic resonance , chromatography , computer science , scanning electron microscope , artificial intelligence , thermodynamics , programming language , image (mathematics)
An experimental method is described which enables the inelastically scattered X‐ray component to be removed from diffractometer data prior to radial density function analysis. At each scattering angle an energy spectrum is generated from a Si(Li) detector combined with a multi‐channel analyser from which the coherently scattered component is separated. The data obtained from organic polymers has an improved signal/noise ratio at high values of scattering angle, and a commensurate enhancement of resolution of the RDF at low r is demonstrated for the case of PMMA (ICI `Perspex'). The method obviates the need for the complicated correction for multiple scattering.